<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <link rel="stylesheet" type="text/css" href="./js/index.css">
    <title>Document</title>
</head>
<body>
   
<section id="todoapp">
    <header class="header"> 
        <h1>YY记事本</h1>
        <input v-model="inputValue" @keyup.enter="add" autofocus="autofocus" autocomplete="off" placeholder="请输入任务" class="new-todo">
    </header>
    <section class="main"> 
        <ul class="todo-list">
            <li class="todo" v-for="(item,index) in list">
                <div class="view" style="height:60px">
                    <span class="index">{{index+1}}.</span>
                    <label>{{item}}</label>
                    <button class="destroy" @click="des(index)"></button>
                </div>
            </li>
        </ul>
    </section>
    <!--统计和清空-->
        <footer class="footer">
            <span class="todo-count" v-show="list.length!=0">
                <strong>{{ list.length }}</strong> items left
            </span>
            <button v-show="list.length!=0" class="clear-completed" @click="clear">
                Clear
            </button>
        </footer>
    <section>
    </section>
    <!--底部-->
    <footer class="info">
    </footer>
</section>
    <footer class="info">
    </footer>
    <script>
        var app=new Vue({
            el:"#todoapp",
            data:{
                list:["写代码","吃饭饭","睡觉觉","看电影"],
                inputValue:"好好学习，天天向上",
            },
            methods:{
                add:function(){
                    this.list.push(this.inputValue)
                },
                des:function(index){
                    this.list.splice(index,1);
                },
                clear:function(){
                    this.list=[];
                }
            }
        })
    </script>
</body>
</html>